The children whom born outside of marriage can become trustworthiness of his/her mother's husband onlv if it has his consent and be noticed at mortal agreement. It has abided by one of contract on Islamic law principles that's recognized as voluntary. In the marital agreement might to be acquiesced that the children whom born outside of marriage will receive funds for his/her education and living costs. But in that agreement does not mention the name of the children to be clearer to who will get the funds giving for. More over the agreement does not say regarding else gifts to be father's responsibility. To anticipate under Islamic law principles which said that the children have no patrimony portions then can be created escrow gramt by last will or gift method's from his/her father.